1059 results about "Carbon substrate" patented technology

The invention relates to a battery monomer, a battery device and a power utilization device, the battery monomer comprises an electrode assembly and an electrolyte, and the electrode assembly comprises a positive pole piece and a negative pole piece; the positive pole piece comprises a positive pole current collecting part and a positive pole film layer; the positive pole film layer comprises lithium-containing phosphate with an olivine structure; the negative pole piece comprises a negative pole current collecting part and a negative pole film layer, and the negative pole film layer comprises a carbon-based material; the electrolyte comprises a carboxylic ester solvent, a first additive and fluorine-containing lithium sulfimide, and the mass content of the carboxylic ester solvent is 8%-60%; the total mass content of the first additive is 2.5%-10%, the first additive comprises 1, 3-propane sultone with the mass content larger than or equal to 0, an ethylene carbonate derivative with the mass content larger than or equal to 0 and vinylene carbonate with the mass content larger than 0, and the ethylene carbonate derivative comprises a compound shown in the formula A; the mass content of the fluorine-containing lithium sulfimide is 4%-8%. According to the invention, the rapid charging performance and the cycle performance of the battery monomer can be improved. # imgabs0 # formula A

The invention relates to a battery monomer, a battery device and a power utilization device, the battery monomer comprises an electrolyte, a positive pole piece and a negative pole piece, the positive pole piece comprises a positive pole current collecting part and a positive pole film layer located on at least one surface of the positive pole current collecting part and containing a positive pole active material, and the positive pole active material comprises lithium-containing phosphate of an olivine structure; the coating weight of one side of the positive electrode film layer is 200mg / 1540.25 mm < 2 > to 370mg / 1540.25 mm < 2 >, the negative electrode plate comprises a negative electrode current collecting part and a negative electrode film layer which is positioned on at least one surface of the negative electrode current collecting part and contains a negative electrode active material, the negative electrode active material comprises a carbon-based material, the conductivity of the electrolyte is 13-20mS / cm, the battery monomer is subjected to constant-current discharge from a 100% state of charge (0.33 C) to 2.0 V at 25 DEG C, and a discharge platform voltage V1 is 3.19-3.235 V. According to the invention, the fast charging performance, the energy density and the cycle performance of the battery monomer can be improved.

The invention discloses preparation and application of a diatomic catalyst modified carbon felt electrode. The preparation method of the modified carbon felt electrode comprises the following steps: dissolving bismuth salt, cobalt salt and urea in water to obtain a complexing solution; immersing the carbon felt substrate subjected to acid activation into a complexing solution for soaking treatment, then taking out the carbon felt substrate, and drying to obtain a precursor-loaded carbon felt; and sequentially carrying out primary heating, cold shock and secondary heating treatment on the precursor-loaded carbon felt, and cooling to obtain the Bi-Co diatom modified carbon felt electrode. The carbon felt electrode can be applied to an all-vanadium redox flow battery. The innovation point of the invention lies in that through the synergistic effect of double atoms and the mutual cooperation of the nitrogen-doped carbon substrate, the intrinsic activity bottleneck of the traditional catalyst is broken through, the comprehensive advantages of high catalytic activity, excellent stability and low cost are achieved, and a new technical solution is provided for the high performance and large-scale application of the flow battery.

The invention provides a secondary battery and an electric device. The secondary battery comprises a negative electrode piece, the negative electrode piece comprises a negative electrode current collector and a negative electrode film layer located on at least one surface of the negative electrode current collector, the negative electrode film layer is provided with a first surface away from the negative electrode current collector and a second surface opposite to the first surface, and the thickness of the negative electrode film layer is marked as H; wherein the area from the first surface of the negative electrode film layer to the thickness range of 0.3 H is marked as a first area and comprises a first negative electrode active material, the first negative electrode active material comprises a first carbon-based material, and the first carbon-based material meets the condition that the total pore area S1 of the outer area is smaller than the total pore area S2 of the inner area. The secondary battery has improved dynamic performance, and the volume distribution particle size Dv50 of the first carbon-based material is less than or equal to 15 [mu] m. The secondary battery has improved dynamic performance.

The invention provides a bimetallic-catalyzed magnesium-based hydrogen storage material and a preparation method thereof, and relates to the technical field of hydrogen energy. The magnesium-based hydrogen storage material is a compound mainly formed by magnesium hydride and a catalyst, and the catalyst is a bimetallic catalyst TiO2 / C / Ni formed by loading nickel and titanium dioxide on a carbon substrate; according to the magnesium-based hydrogen storage material MgH2-TiO2 / C / Ni, a bimetallic catalyst TiO2 / C / Ni is introduced into MgH2, trace efficient catalysis of MgH2 is achieved, the hydrogen storage capacity of MgH2 is not excessively lost, meanwhile, the excellent catalytic effect can be achieved, and therefore the prepared magnesium-based hydrogen storage material MgH2-TiO2 / C / Ni shows excellent hydrogen storage performance and hydrogen absorption and desorption cycle stability. The invention also provides a preparation method of the bimetal catalyzed magnesium-based hydrogen storage material, and the preparation method introduces a catalyst into an MgH2 system through a ball milling method to realize stable preparation of the magnesium-based hydrogen storage material.

The application provides a cement-based zinc ion hybrid capacitor, a preparation method thereof and application of the capacitor in an energy storage device. The cement-based zinc ion hybrid capacitor comprises an active carbon positive electrode, a zinc foil negative electrode and a composite air-entraining mortar interlayer arranged between the two electrodes. The active carbon positive electrode is active carbon loaded on a carrier with good conductivity, and the carrier is any one of carbon-based materials such as carbon felt, carbon fiber and graphite plate or any one of foils, meshes and foams of metals such as stainless steel, copper, titanium and nickel and alloys thereof. The composite air-entraining mortar interlayer between the two electrodes is immersed in an electrolyte under negative pressure. The composite air-entraining mortar has interconnected pores, and ions are transmitted through the electrolyte in the pores and participate in electrode reactions. The application mainly provides a porous cement-based solid electrolyte based on a composite air-entraining technology and a structural electrochemical energy storage device, and the structural energy storage device can simultaneously have good energy storage characteristics and mechanical properties.

The invention discloses a method for degrading tetracycline and oxytetracycline through an electrocatalytic water oxidation production treatment liquid, which comprises the following steps: (1) preparation of the electrocatalytic water oxidation treatment liquid: constructing an electrocatalytic environment and an electrochemical double cell, separating an anode and a cathode through a nafion membrane only allowing protons to pass through, enabling the anode to be a carbon-based material loaded with a water oxidation material, and preparing the electrocatalytic water oxidation treatment liquid through a Nafion membrane only allowing protons to pass through; the cathode is a graphite sheet, and the electrolyte is a mixed solution of potassium carbonate and potassium bicarbonate. Then carrying out an electro-catalysis water oxidation reaction to obtain a treatment solution; and (2) degrading tetracycline antibiotic pollutants by using the electro-catalytic water oxidation treatment liquid: taking out the electro-catalytic water oxidation treatment liquid in the step (1) at normal temperature and pressure, putting the electro-catalytic water oxidation treatment liquid into a water sample containing tetracycline or oxytetracycline, and stirring, so that tetracycline and oxytetracycline can be oxidized and degraded without adding any chemical reagent and other operations.

The invention provides a secondary battery and a power utilization device, the secondary battery comprises a negative pole piece, and the negative pole piece comprises a negative current collector and a negative film layer which is located on at least one surface of the negative current collector and comprises a negative active material. The negative electrode active material comprises a first carbon-based material and a second carbon-based material, the first carbon-based material comprises an outer region and an inner region located on the inner side of the outer region, and the outer region is a region formed by extending the particle surface of the first carbon-based material to the interior of the particle by a distance of 2.5 [mu] m; in a sectional view of the first carbon-based material, the total pore area of the outer region is recorded as S1, and the total pore area of the inner region is recorded as S2, and S2gt; s1, and the graphitization degree of the first carbon-based material is greater than the graphitization degree of the second carbon-based material. The secondary battery provided by the invention has excellent cycle performance and dynamic performance while having high energy density.

The invention relates to the technical field of novel energy materials, in particular to a photo-thermal driving shape memory type heat storage and temperature regulation phase change material and a preparation method and application thereof, and the photo-thermal driving shape memory type heat storage and temperature regulation phase change material comprises a polyurethane phase change material and a photo-thermal conversion material; the polyurethane phase change material is prepared from polyether type polyol, polyester type polyol, isocyanate and small molecule polyol; wherein the molar ratio of the polyether type polyol to the polyester type polyol is 1: (1 to 1000), and the molecular weight of the polyether type polyol is 10000 to 900000; the photothermal conversion material comprises one or more of carbon-based materials such as graphene, graphene oxide and a carbon nano tube. The phase change material has the advantages of high enthalpy value, high strength, photothermal conversion performance, good flexibility and reversible shape memorability, simple preparation method and low cost, and can be widely used in the fields of artificial muscle fibers, heat storage and temperature regulation intelligent textiles, heat management and the like.

The utility model discloses a gas distribution device for graphite powder, and belongs to the field of carbon-based material production equipment. The technical problem that when high-temperature purification equipment purifies graphite powder, the purity of the graphite powder is not high is solved. According to the technical scheme, the gas distribution device comprises a gas distribution device body, one end face of the gas distribution device body is provided with a plurality of gas channels, the gas channels are distributed in a radial mode, each gas channel is provided with a plurality of first gas holes, the first gas holes in each gas channel are linearly distributed, and second gas holes are formed in the positions, communicated with the gas channels, of the gas distribution device body. The first air holes and the second air holes are linearly arranged, a plurality of positioning grooves are formed in the other end face of the air distribution device body, the positioning grooves are used for containing object carrying devices, ventilation pipelines on the object carrying devices correspond to and communicate with the first air holes in a one-to-one mode, and ventilation pipelines correspond to and communicate with the second air holes in a one-to-one mode; the utility model is applied to high-temperature purification equipment.

The invention discloses a lithium iron phosphate positive electrode material rich in oxygen vacancies and a preparation method and application thereof.The preparation method of the lithium iron phosphate positive electrode material rich in oxygen vacancies has the advantages that the number of heating times can be set in a programmable mode, the heating and cooling speed is high, and the heat treatment time is short; the volatilization amount of the lithium salt is small, and the method is more economical and environment-friendly; according to the method, a programmable constant-current power supply is used for electrifying and heating the carbon-based Joule thermal material, and the carbon-based material is used as a heating stage to realize ultrafast synthesis of the lithium iron phosphate material through a physical contact heat transfer effect; and the oxygen vacancy content can be adjusted by regulating and controlling parameters such as temperature and time. The heat treatment is performed in a specific atmosphere (such as vacuum, inert gas, reducing gas and oxidizing atmosphere), so that the reoxidation of the oxygen vacancies can be reduced, and the formation and the stabilization of the oxygen vacancies are facilitated; the adjustable and controllable range of the oxygen vacancy concentration in the lithium iron phosphate material prepared by the preparation method disclosed by the invention is 2.198 E12 to 7.382 E13Spins / mm < 3 >.

The invention discloses an electromagnetic shielding method for a high-density integrated wireless audio module, and the method comprises the steps: employing a metal material with good conductivity and corrosion resistance, such as aluminum alloy and copper alloy, to cover the outer surface of the module, and enabling the outer metal shielding layer to be used for isolating external electromagnetic interference; the thickness of the outer metal shielding layer is generally 0.3 mm to 1 mm, it is ensured that external electromagnetic radiation can be effectively reflected or absorbed, and the outer metal shielding layer is located between the outer metal shielding layer and the inner conductive coating and is made of a material with high-frequency absorption performance, such as a ferrite material, a conductive polymer or a carbon-based material. The thickness of the wave-absorbing layer can be designed according to the electromagnetic characteristics of a working frequency band and is generally 0.5 mm to 2 mm, so that high-frequency noise can be effectively attenuated. By adopting a multi-layer shielding structure and an intelligent heat dissipation design, electromagnetic interference is effectively reduced, miniaturization and light weight of the wireless audio module are maintained, and compared with the prior art in which a large number of expensive shielding materials are needed, the wireless audio module has the advantages that the selection of the shielding materials and the intelligent heat dissipation design are optimized.

The invention provides a preparation method of an ultrahigh-temperature oxidation ablation resistant tantalum-based ceramic and silicon carbide composite thermal protection coating, which comprises the following steps: (1) mixing a polymer binder and a solvent to form a solution, and carrying out ball-milling mixing on the solution, a tantalum-containing compound, silicon carbide, silicon and other components to prepare precursor slurry; (2) uniformly coating the surface of a carbon substrate with the slurry obtained in the step (1) by a dip-coating method, and drying; (3) realizing curing and pyrolysis of the coating through segmented heat treatment; and (4) the coating is subjected to vacuum siliconizing treatment, and the composite thermal protection coating is obtained. According to the tantalum-based ceramic and silicon carbide composite thermal protection coating prepared through the method, the ultrahigh-temperature oxidation resistance, ablation resistance, thermal shock resistance and heat insulation performance of the coating are remarkably improved. After the coating is ablated for 2400s under oxyacetylene flame at the temperature of 1650 DEG C, the integrity and excellent thermal protection effect of the coating can still be kept.

Disclosed herein is a current collector, a secondary battery, an electrical device, and a method for preparing the current collector. The current collector includes a substrate. The substrate includes the porous material. The affinity material is disposed in pores of the porous material. The affinity material is configured to promote the deposition of metal ions in an electrolyte solution. The affinity material includes at least one of a carbon-based material, a non-metal oxide, a carbide, a fluoride, a nitride, a sulfide, a phosphide, and an organic material. The above manner is able to effectively reduce the nucleation overpotential of the metal ions on the porous material of the current collector, promote the uniform diffusion and deposition of the metal ions within the pores of the porous material of the current collector, inhibit the generation of a dendrite, and improve the cyclic performance and safety of the battery.

The invention provides a secondary battery and an electric device. The secondary battery comprises a negative electrode piece, the negative electrode piece comprises a negative electrode current collector and a negative electrode film layer located on at least one surface of the negative electrode current collector, the negative electrode film layer comprises a negative electrode active material, the negative electrode active material comprises a first carbon-based material and a second carbon-based material, the first carbon-based material and the second carbon-based material both have pore structures, the ID / IG of the first carbon-based material is less than or equal to 0.27, the ID / IG of the second carbon-based material is greater than or equal to 0.38, ID represents the D peak intensity of a Raman spectrum at 1350 + / -50 cm <-1 >, and IG represents the G peak intensity of the Raman spectrum at 1580 + / -50 cm <-1 >. The secondary battery has improved low temperature dynamic performance and high temperature storage performance.

The invention provides a self-supporting carbon-based material loaded with iron nanoparticles as well as a preparation method and application of the self-supporting carbon-based material, and belongs to the technical field of preparation and application of an electrocatalyst for removing nitrate in sewage. The preparation method of the self-supporting carbon-based material loaded with the iron nanoparticles comprises the following steps: providing a carbon felt subjected to acid pickling and water bath heating; the method comprises the following steps: mixing an iron precursor and urea in a solvent to obtain a mixed solution containing iron salt; and mixing the carbon felt with the mixed solution containing the iron salt, and carrying out a hydrothermal reaction to obtain the self-supporting carbon-based material loaded with the iron nanoparticles. When the iron nanoparticle-loaded self-supporting carbon-based material provided by the invention is used as a cathode for electro-catalysis of nitrate-containing wastewater, a good removal rate and ammonia nitrogen selectivity are achieved, and the catalyst can keep relatively high nitrate nitrogen removal and ammonia nitrogen production effects under the conditions of acidity, neutrality, alkalinity and different initial nitrate concentrations; the method has the advantages of high removal efficiency, good ammonia nitrogen selectivity, strong stability and the like.

The invention refers to an oxidation-reduction system configured for water or wastewater treatment by removal of organic and inorganic pollutants comprising a catalytic oxidation multiphase reactor (1) in series with a catalytic reduction multiphase reactor (6), wherein at least one catalytic bed (2,7) comprises a macrostructured catalyst. The invention also refers to a catalyst for heterogeneous catalytic ozonation and / or for heterogeneous catalytic reduction comprising an active component selected from a group consisting of a metal, a metal oxide, or a carbon-based material supported on a macrostructured catalyst. The combined processes (catalytic ozonation and reduction) are able to remove emerging organic and inorganic (micro)pollutants more efficiently, promoting not only the degradation and ultimately mineralization of organic pollutants, but also the transformation of resulting inorganic subproducts into non-harmful substances.

The invention discloses a method for preparing an ultrahigh-temperature ceramic coating by an ultrahigh-temperature metal gas source based on a molten salt medium, which comprises the following steps of: mixing low-melting-point salt A, metal fluoride and metal M to obtain a mixture C, putting the mixture C into a first crucible, mixing low-melting-point salt B and metal M to obtain a mixture D, putting the mixture D into a second crucible, putting a carbon base material into a deposition furnace, and performing vacuum drying to obtain the ultrahigh-temperature ceramic coating. Heating the first crucible to melt the mixture C to obtain a melt E, and heating the second crucible to melt the mixture D to obtain a melt F; carrier gas is guided into the first crucible, the carrier gas flow passes through the melt E to form gas flow containing a metal gas source, the gas flow containing the metal gas source is guided into the second crucible, and the gas flow containing the metal gas source is filtered by the melt F in the second crucible to form a pure metal reaction gas source, and finally, a pure metal reaction gas source is introduced into the deposition furnace for deposition of the carbon base material, and the ultra-high-temperature ceramic coating is obtained. The method is easy to operate and low in cost.

The invention discloses a carbon-based confinement type catalyst as well as a preparation method and application thereof. The catalyst comprises a sludge carbon substrate, and carbon nanotubes and active metals covering the surface of the substrate, the active metal comprises Fe and Ni; ni is doped in the carbon nanotube to form a confinement structure; fe is loaded outside the carbon nanotubes. The active metal of the carbon-based confinement type catalyst is confined in a superstructure carbon nanostructure covering the surface of a carbon substrate, so that the hydrothermal oxidation efficiency can be effectively improved, the degree of cracking of sludge extracellular polymeric substances is improved, deep cracking of sludge is realized, and the risk of secondary pollution caused by loss of the active metal is reduced; the catalyst can selectively oxidize macromolecular organic matters released by sludge disintegration, the product selectivity of micromolecular carboxylic acid is improved to be higher than 95% by a confinement structure, the micromolecular carboxylic acid can be further utilized as a carbon source, the treated supernate can be used as a composite carbon source to be applied to the biochemical process of sewage treatment, and resource utilization is realized; the catalyst can realize HTO treatment of sludge at 200 DEG C or below, and does not generate biotoxic by-products in the sludge treatment process, and the treated product can be used as a high-quality carbon source.

The invention provides a composite photo-thermal hydrogel for seawater desalination and a preparation method and application thereof, the hydrogel has a structural unit of a structure as shown in a formula I. COF with photo-thermal performance is compounded with the hydrogel, and the hydrogel has a three-dimensional long-range ordered pore structure to promote transmission of water molecules; and the COF dispersed in the material contains porphyrin and a C = N double-bond connection structure, so that the material has excellent photothermal conversion efficiency. Therefore, under the irradiation of sunlight, the composite photo-thermal hydrogel disclosed by the invention can realize photo-thermal conversion to realize seawater evaporation, the seawater evaporation rate reaches 3.6 kgm <-1 > h <-1 >, and the performance is improved by about 3 times compared with that of a traditional carbon-based material. According to the preparation method of the composite photo-thermal hydrogel, large and complex equipment is not involved in the preparation method, the preparation technological process is simple, and industrial large-scale production is facilitated; and the reaction temperature in the preparation process is low, the energy consumption is also reduced, and the cost advantage is remarkable.

The invention provides a preparation method of an iron and nitrogen co-doped biomass-based carbon material, which can be applied to the technical fields of environmental functional materials and advanced oxidation. The preparation method comprises the following steps: obtaining target charcoal precursor powder; mixing the charcoal precursor powder with soluble ferric salt and urea to form initial mixed powder, adding water into the initial powder, and drying after water bath to obtain mixed powder; and heating and calcining the mixed powder according to preset process parameters to obtain the iron and nitrogen co-doped biomass-based carbon material. The prepared iron and nitrogen co-doped biomass-based carbon material FeOx has a high specific surface area and a rich pore structure, FeOx is uniformly dispersed on a nitrogen-doped carbon substrate, ozone catalytic activity and electron conduction performance are improved, and reactive oxygen species (ROS) can be efficiently generated to degrade sulfamethoxazole.

The invention provides an electrode material, a preparation method thereof and a sodium ion battery. The electrode material comprises a carbon substrate and metal nitride doped in the carbon substrate, the carbon matrix has a closed hole in which at least a portion of the metal nitride is located. The carbon substrate is provided with the closed hole, at least part of the metal nitride is filled in the closed hole, the closed hole can prevent the metal nitride from escaping from the hole, the metal nitride in the closed hole can improve the electric field and the sodium storage activity of the central area of the closed hole, the internal resistance of sodium filled in the closed hole is reduced, polarization is inhibited, and sodium precipitation is reduced; the sodium storage utilization rate of the central area of the closed hole is improved, and the sodium storage capacity performance of the electrode material is further improved.

The invention relates to a battery monomer, a battery device and a power utilization device, the battery monomer comprises a negative pole piece, a positive pole piece and an electrolyte, the battery monomer comprises a negative current collector and a negative film layer arranged on at least one side of the negative current collector, the negative film layer comprises a negative active material, and the negative active material comprises a carbon-based material; the positive pole piece comprises a positive pole current collector and a positive pole film layer arranged on at least one side of the positive pole current collector, the positive pole film layer comprises a positive pole active material and a positive pole additive, and the positive pole active material comprises the positive pole additive which comprises at least one of lithium-containing iron oxide and lithium-containing cobalt oxide; the electrolyte comprises an organic solvent, the organic solvent comprises a carboxylic ester solvent, and the mass content of the carboxylic ester solvent in the electrolyte is 3%-70%. The high-temperature cycle performance of the battery monomer can be further improved.

The invention discloses a silicon-carbon composite negative electrode material prepared by using ALD and CVD technologies, a preparation method and a lithium battery. The preparation method comprises the following steps: growing a first metal oxide on the surface of a carbon substrate material by using an ALD atomic layer deposition method; reducing the first metal oxide on the surface of the carbon substrate material into nanodots containing metal elements in the reaction cavity; heating the carbon substrate material distributed with the nano-dots in a reaction furnace, injecting a gas mixture which comprises silane and inert gas, and growing silicon nanowires on the nano-dots based on a silane CVD (Chemical Vapor Deposition) cracking process; and heating the carbon substrate material on which the silicon nanowire grows in a reaction furnace, injecting hydrocarbon gas, and coating the surface of the silicon nanowire with a carbon layer based on a CVD cracking process to obtain the silicon-carbon composite negative electrode material, so that the method for preparing the silicon-carbon composite negative electrode material can effectively prevent the volume expansion of the silicon nanowire in the charging and discharging process, and the service life of the silicon-carbon composite negative electrode material is prolonged. And the cycle performance of the silicon-carbon composite negative electrode material is improved.

The invention relates to the technical field of soil improvement, and discloses a carbon-based material as well as a preparation method and application thereof. The carbon-based material is electron shuttle modified lignin. According to the carbon-based material provided by the invention, the lignin is subjected to surface modification by using the electron shuttle, the lignin is rich in resource, easily available in raw material, low in cost, good in stability and harmless, and high electron shuttle activity fragments are introduced on the surface by combining with the electron shuttle, so that the electron shuttle capability is greatly improved; the carbon-based material has the capability of promoting reduction and dissolution of soil minerals, and can be applied to soil improvement, improvement of electron transfer rate between microorganisms and minerals, acceleration of mineral dissolution and activation of soil mineral elements, effective regulation and control of soil iron circulation process so as to improve soil trophism, and guarantee for healthy growth of plants. Compared with a small-molecule shuttle, the shuttle is not easy to deteriorate or lose in the environment, can play a role in soil for a long time, and has great application potential for carbon sequestration and quality improvement of soil and guarantee of crop nutrition.

The invention relates to a battery monomer, a battery device and a power utilization device, the battery monomer comprises a negative pole piece and an electrolyte, the negative pole piece comprises a negative current collector and a negative film layer arranged on at least one side of the negative current collector, the negative film layer comprises a negative active material, the negative active material comprises a silicon-based material and a carbon-based material, and the silicon-based material and the carbon-based material are arranged on the negative current collector. The mass content of the silicon element of the silicon-based material in the negative electrode active material is 0.3%-15%, and the single-side coating weight of the negative electrode film layer is 80 mg / 1540.25 mm < 2 >-150 mg / 1540.25 mm < 2 >; the electrolyte comprises an organic solvent, the organic solvent comprises a carboxylic ester solvent, and the mass content of the carboxylic ester solvent in the electrolyte is 3%-70%. The high-temperature storage performance and the cycle performance of the battery monomer can be further improved.

The invention discloses a surface oxidation monatomic nano-alloy catalyst as well as a preparation method and application thereof, and belongs to the technical field of advanced nano-energy materials and electro-catalysis. A surface-oxidized monatomic nano-alloy catalyst comprises a hydroxylated carbon nanotube carrier and bimetallic nano-alloy particles loaded on the hydroxylated carbon nanotube carrier, in the bimetallic nano-alloy particles, non-noble metal elements are dispersed in noble metal nano-particles in a monatomic form, the size of the bimetallic nano-alloy particles is 3-4 nm, and the surface-oxidized monatomic nano-alloy catalyst is prepared from a surface-oxidized monatomic nano-alloy catalyst. An oxide layer with the thickness of 0.3-0.6 nm is arranged on the surface of the bimetallic nano-alloy particle; the loading amount of the noble metal is 5-15wt%. Ruthenium and other non-noble metal elements are alloyed and anchored on the carbon material substrate, the conductivity of the catalyst can be greatly improved, the size of alloy particles is accurately controlled within the range of 3-4 nm, active sites can be exposed to the maximum extent, and structural stability is considered.

The invention relates to a flow battery carbon-based electrode and a preparation method and application thereof, and the preparation method comprises the following steps: respectively dissolving cobalt salt and alkali in a polar organic solvent, and uniformly mixing to form a precursor solution; placing a carbon-based material in the precursor solution, and carrying out a hydrothermal reaction to obtain a carbon-based electrode precursor; and performing high-temperature carbonization on the carbon-based electrode precursor in an inert atmosphere, cooling to room temperature after the reaction is completed, and then cleaning and removing impurities from a product to obtain the carbon-based electrode, the polar organic solvent is at least one of formamide, acetonitrile and N, N-dimethylformamide; after cobalt cyanide is deposited on the surface of the carbon-based material, surface etching and nitrogen doping are carried out on the carbon-based material under the high-temperature condition, surface modification of the carbon-based material is achieved, the contact area of the surface of the carbon-based electrode and electrolyte is increased, and the electrochemical performance of the carbon-based electrode is improved.

The invention discloses a hydrophilic carbon-based material modified high-entropy alloy water electrolysis hydrogen production catalyst and a preparation method and application thereof, and belongs to the technical field of catalyst preparation. Comprising the following steps: 1) adding a hydrophilic carbon-based material and mixed metal salt into an ethylene glycol solution, and ultrasonically mixing uniformly to obtain a reaction solution; and 2) heating an ethylene glycol solution to 200-240 DEG C through an oil bath, then slowly adding the reaction liquid prepared in the step 1) into the ethylene glycol solution, carrying out heating treatment for 0.5-2 hours, cooling, and centrifuging to prepare the carbon-based material modified high-entropy alloy water electrolysis hydrogen production catalyst. The prepared hydrophilic carbon-based material modified high-entropy alloy water electrolysis hydrogen production catalyst has high activity, and generated hydrogen bubbles are smaller and can be separated from the surface of an electrode more easily.

The invention provides a polyurethane composite material and application thereof, and relates to the technical field of polyurethane materials. The polyurethane composite material consists of a component A and a component B, the component A comprises the following raw material components in parts by weight: 100 parts of polymer dihydric alcohol, 1-8 parts of a chain extender, 1-3 parts of a catalyst, 0-5 parts of a cross-linking agent, 0.1-2 parts of a carbon-based material, 1-10 parts of an anthraquinone compound and 0.5-2 parts of water; and the component B is an isocyanate curing agent and comprises a prepolymer with a plurality of ester bonds and urea bonds. The polyurethane composite material disclosed by the invention has relatively high mechanical strength, wear resistance and the like, and is suitable for treating nitrogen-containing sewage.